S Subbu wrote:i am unaware of web services . My Requirement is in my project is online Payment System(I was new to this type of payments).

Online payment systems have been solved technology since the turn of the century. Doing a real payment system (as opposed to a college programming assignment) from scratch is a huge amount of work -- there are many commercial solutions that are well tested, documented and run.

As a learning experience, it can make sense, if the rigor required is modest.

For a commercial product, unless you are Amazon or Apple, it makes zero sense to reinvent the wheel.